Mold for making packing-rings.



O. H. REYNOLDS.

' MOLD FOR MAKING PACKING RINGS.

APPLIGATION FILED FEBA, 1911.

Patented Apr.'16, 1912.

onAnLEs n. REYNOLDS, or nocnnsrnn, NEW YORK.

mom) FOR MAKING PACKING-RINGS.

To all whom it may concern:

Be it known that 1, CHARLES H. REYN- oms, a citizen of the UnitedStates, residing at Rochester, in the county of Monroe and State of NewYork, have invented. certainnew and useful Improvements in Molds forMaking Packing-Rings; .and I do hereby declare the followin to be afull, clear, and exact description 0 the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame. 1 I p This invention relates to molds for making packing rings foruse in connection with valves, and has for its object to produce a.

mold which will make an oblong tapered ring with facility and at aminimum expense.

To these ends the invention consists in the novel details ofconstruction and-combinations of parts more fully hereinafter disclosedand particularly pointed out in the claims.

Referring to the accompanying drawings forming a part of thisspecification, in which like numerals and letters designate like partsin all the views:Figure 1 is a sectional view showing the partsassembled and the mold cavity in cross section; Fig. 2 is a plan view onan enlarged scale of the top mold memberas seen from below in Fig. 1;Fig. 3 is a sectional view of the bottom mold member removed from itsposition as shown in Fig. 1; Fig. 4 is a planview of the outer holdingmember of the mold with the parts shown in Figs. 2 and 3 removed; Fig. 5is a plan view of the central cylindrical plug shown in Fig. 1 aspassing through the members illustrated in Figs. 2, 3, and 1 4; Fig. 6is a detail sectional view of the parts shown in Fig. 1 and illustratinga portion of the ring being molded and, Fig. 7 is a perspective. view ofthe completed packing rings made in the mold shown in Fig. 1.

1 illustrates a top mold or die member provided with the shoulder 2fitting the top edge 3 of the hollow holding member 4.

5 represents an inner mold or die member fitting inside the retaining orholding member 4, and 6 represents a plug member or core, oblong incross section fitting the members 1, 4 and 5, as will be more fullydisclosed hereinafter. I

The top member 1 is provided with an oblong hole 7 surrounded at one endby the edge 8, and from this edge extends the con- Specification ofLetters Patent. Application filed February 4, 1911.

Patented Apr. 16, 1912.

Serial No. 606,619.

'vexly curved surface 9 terminating at 10 where it. is joined by theflat surface 11 terminating at the edge 12, as will be clear from Figs.1 and 2. The bottom member 5 is likewise provided with an oblong orifice13 surrounded at one end by the edge 14 from which extends the fiatsurface 15 joined as at 16 by'the concaved surface 17 terminating in theedge 18 surrounding said surface 17. The said upper and lower members 1and 5 fit snugly inside the holding .member 4 as shown, and the lowermember 5 seats upon a shoulder 19 in said member 4 as best seen inFig. 1. The oblong plug shaped member 6 passes through the orifices 7and 13 in the members '1 and 5; and is provided with a cylindricalextension or shank 20 passing through the orifice 21 in said holdingmember 4, thereby firmly holding the parts in place.

When the parts are assembled as described, the edges 8 and 14 of themembers 1 and 5 fit snugly against the cylindrical surface of the plug6, leaving a flat surface 22 of said plug constituting a portion of themold cavity. Likewise, the'edge 18 of the member 5 and the edge 12 ofthe member 1 fit snugly against the inside surface of the holding member4, and are separated so as to leave the surface 23 of said member 4 toconstitute another portion of the mold cavity.

It results from the construction now disclosed that the mold cavity isaccordingly made up of, the surface 22, of the plug 6, the convexsurface 9, and the straight surface 11 of the upper mold member, thesurface 23 of the holding member 4, the concave surface 17 of the member5, and the straight surface 15 of said member. The plug or core 6 isconstructed with a shoulder or collar 32 which fits flush within acorrespondingly shaped recess 33 in the member 4, and one face of saidshoulder lies in intimate contact with the base of the die piece 5. Thedie member 5 may be moved or driven with respect to the member 1'through the medium of the shank 20, as for instance through the agencyof a hydraulic or other ress. p The ring illustrated in Fig. 7 is formedin the cavity just described, and consists of the straight members 25and 26, each of which is provided with the edges 0 and cl, which areconnected by a convex surface formed on the concave surface 17 of themold, an

edge 6 connected with the edge d by a fiat surface formed on the surface23 of the mold, an edge f, best shown on the member 25, connected to theed e e by a fiat surface formed on the flat sur ace 11, of the mold,

an edge a connected to the edge f by a con cave surface formed on theconvex surface 9 of the mold, an edge I) connected by a flat surfaceformed on the surface 22 and a flat surface joining the edges 1) and 0formed on the flat surface 15 of the mold. The said straight members 25and 26 of the ring are further joined by curved members 27 and 28, whichare formed in channels 29 and 30 of the mold cavity, as. bestillustrated in Fig. 2, and which join the lateral channels of the moldshown in cross section in Fig; 1, as will be readily understood.

In operation the member 1 is removed from the position shown in Fig. 1,and the material of which the ring is to be made is inserted in the.oblong annular space between the plug 6 and the member 1. Said member 1is'now replaced and forced'down until its shoulder 2 contacts with theedge 3 of the member 4. The mold is then subjected to the requiredpressure which as heretofore stated is directed against the shank 20 ofthe plug or core 6. Of course, When dealing with those materialsrequiring heat to properly set them, the mold may be heated withoutdeparting from the principles above disclosed.

It is obvious that those skilled in the art may vary the details ofconstruction and the arrangement of parts without departing from thespirit of my invention, and therefore, I do not wish to be limited tosuch features except as may be required by the die located and movablewithin said retaining member; a core engaging with said retaining anddie members; and a shoulder on said core in contact with the second diemember, and a shank on the core; said shoulder adapted to*move thesecond die through said shank to compress the molded article,substantially as described.

.3. In a mold the combination of a retaining member; a die located andmovable within said retaining member; a second die located and movablewithin said retaining member; a core engaging with said retaining anddie members; and a shoulder on said core in contact with the second die;said shoulder adapted to move the second die through said shank tocompress the molded article, substantially as described.

4. In a mold for making packing rings,.

the combination of a retaining member having a chamber; a member havinga die head projecting within. said chamber; a second die mounted whollywithin and movable within the chamber; a core projecting through theretaining members and the dies; and ashoulder on the'coreengaging withthe second die; said shoulder adapted to move the second die throughpressure on the core to compress the molded article, substantially asdescribed.

5. In a mold for making packing rings,

the combination of a retaining member having a chamber with a recess inthe base ther'eof'; a member having a die head projecting within saidchamber; a second die located wholly within and movable within saidchamber; a core projecting through said retaming member and the d es;and a' shoulder on said core fitting flush within the chamberrecess,'said shoulder engaging with and adapted to move the second diethrough pressure on the core to compress the molded article,substantially as described.

6. Ina mold for making packing rings, the combination of a holdingmember provided with a top edge; a portion adapted to form a part of themold cavity and a seat 19; a lower mold member adapted to fit theinterior of said holding member and to rest on said seat, and having aportion forming another part of the mold cavity; a top mold member alsofitting the interior of said holding member, supplying still anotherportion of said mold cavity, and provided with a shoulder-adapted tocontact with said'top edge; each of said members provided withregistering orifices which are surrounded by vl l 0 said mold cavity;and a plug member passing through said orifices and supplying stillanother portion of said mold cavity, substantially as described.

' Inv testimony whereof, I affix my signature, in presence of twowitnesses.

CHARLES H. REYNOLDS.

' Witnesses:

J OHN M. DYER, EDMOND P. ROMBAUT.

